Nyquist is a language for sound synthesis and music composition.
A graphical interface GUI for Fluidsynth Soundfont Player
An Internet Browser Based Piano and Drum kit Software
A real-time SoundFont software synthesizer
Graphical Soundfont Bank Management for Linux.
DSSI is an audio plugin API for soft synths and effects.
Free open source DAW, MIDI sequencer, software synthesizers
Real-time audio synthesis engine and music programming language
Extensible Brainwave Entrainment library for Java
Open source brainwave entrainment application
Buzztrax is a modular music composer for Linux
free cross-platform music creation software
ZynAddSubFx and Yoshimi midi control
VST Plugins and loop player mixer
Collections of abstractions for Pure Data
Minaton is a fat sounding mono subtractive software synthesizer